Knob attachment



(No Model.)

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UNITED STATES PATENT OFFICE.

GARRET VAN WINKLE, OF NORTH.PLAINFIELD,l NEW JERSEY.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent; No. 349,915, datedSeptember 28, 1886.

(No model.)

.To all whom it may concern:

Be it known that I, GARRET VAN WINKLE, of North Plainfield, in thecounty of Somerset and State of New Jersey, have invented an Improvementin Knob Attachments, of which the following is a specification.

This invention is an improvement upon that for which Letters Patent weregranted to me June 23, 1885, No. 320,602, and the same is for adaptingthe knob attachment to wooden handles especially.

In the drawings, Figure 1 is asection ofthe knob and its shank. Fig. 2is a side view of the sections of the knobshank, and Figs. 3 and 4 areend views of the same.

ln the aforesaid patent the shank is made of two sections, B and C,secured together by a tubular cover, D, or otherwise, and upon thesesections B C are dovetailed portions that are inserted into the mortiseor recess in the knob, and to this extent my present inventioncorresponds to the aforesaid patent, and the manner in which the sameareinserted is also similar.

My present improvement relates especially to the shape or form of theends of the section that pass into the knob. The outer surfaces of theprojecting ends a b are convex, and theyl are ribbed transversely, asshown at h h in Figs. 1 and 2. The object of this construction is toallow for securing the shank-sections in the most firm and reliablemanner within the knob, especially when the knob is of wood, because therecess in the said knob can be formed by a cutter, and then the sectionsinserted with one section at an inclination to the other, as shown bydotted lines in Fig. 1, so as to enter the diverging ends a b into themortise, and then, when the outer ends of the sections are closetogether and the diverging ends spread apart within the knob lthe ribsor projections upon the outside of such diverging ends embed themselvesinto the surface of the wood and prevent the possibility of the partsbecoming loose.

I claim as my invention- The shank-sections B C, having the divergingprojecting ends c b, said ends being conveX on their outer surfaces, andhaving` ribs or projections thereon, in combination with the knob havingthe dovetailed recess adapted to receive the shank-sections,substantially as set fort-h.

Signed by me this 23d day of February, A. D. 1886.

GARRET VAN VINKLE.

Witnesses:

GEo. T. PINCKNEY, WILLIAM G. Mo'r'r.

